简介:ExplainingthecausesofinfeasibilityofBooleanformulashasmanypracticalapplicationsinelectronicdesignautomationandformalverificationofhardware.Furthermore,aminimumexplanationofinfeasibilitythatexcludesallirrelevantinformationisgenerallyofinterest.Asmallest-cardinalityunsatisfiablesubsetcalledaminimumunsatisfiablecorecanprovideasuccinctexplanationofinfea-sibilityandisvaluableforapplications.However,littleattentionhasbeenconcentratedonextractionofminimumunsatisfiablecore.Inthispaper,therelationshipbetweenmaximalsatisfiabilityandmini-mumunsatisfiabilityispresentedandproved,thenanefficientantcolonyalgorithmisproposedtoderiveanexactornearlyexactminimumunsatisfiablecorebasedontherelationship.Finally,ex-perimentalresultsonpracticalbenchmarkscomparedwiththebestknownapproacharereported,andtheresultsshowthattheantcolonyalgorithmstronglyoutperformsthebestpreviousalgorithm.
简介:photonic水晶的热性质有18个循环地分布式的核心的纤维(PCF)激光被使用完整向量的有限元素方法调查(女性)。结果证明18核心PCF与单个核心PCF和19核心PCF相比举办更有效的热分散建设。另外,有不同热负担的18核心PCF激光的温度分发被模仿。当热负担在近似对应于600W的抽的力量的80W/m上面时,结果证明核心温度接近近似拉1800K的价值的纤维,当当热负担在近似对应于110W的抽的力量的15W/m上面时,涂层温度接近大约550K的损坏价值时。因此冷却的纤维是必要的完成力量可伸缩。与另外的不同冷却系统相比,使计划凉下来的铜被发现是一个有效方法减少热效果。
简介:Inthispaper,wedemonstratetheacetylehe(C2H2)sensorwithhighsensitivityusingahollow-corephotonicbandgapfiber(HC-PCF).ExperimentsformeasuringC2H2concentrationsingasmixtureareperformed.Usinga2m-longHC-PCFasgascell,thespectrumofacetyleneatn1+n3bandhasbeenmeasured,andtheP11-branchhasbeenselectedforthepurposeofsensing.Aminimumdetectivityof143partspermillionbyvolume(ppmv)forthesystemconfigurationisestimated.